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Optical absorption monitor system

a monitor system and optical absorption technology, applied in the field of optical absorption monitor systems, can solve the problems that the life of the monitor system significantly affects the total lifetime cost of the monitor system, and achieve the effects of less complex, less expensive, and minimal drift and refractive index sensitivity

Active Publication Date: 2018-01-30
CYTIVA SWEDEN AB
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present absorption monitor system has advantages such as minimal drift and refractive index sensitivity, which makes it more accurate and reliable compared to other systems. It is also simpler and less expensive. Additionally, the system allows for optimum biasing of the UV-LED, which increases its lifespan and reduces maintenance costs. The controller is aware of the bias point and can predict the correct voltage range, which helps eliminate errors caused by absorbance by materials in the flow cell.

Problems solved by technology

As the UV-LED represents a significant part of the total cost of the monitor system, extending its life significantly impacts the total lifetime cost of the monitor system.

Method used

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Embodiment Construction

[0026]As mentioned above, the absorption monitor system of present invention will be illustrated as a flow cell absorption monitor system, although it should be noted that the system may be of static type, immersion type or the like. The key feature is that there is an optical path for detection light through a representative volume of the sample to be analyzed.

[0027]FIG. 1 is a schematic representation of a prior art absorption monitor system in the form of an UV-LED based flow cell absorption monitor system 10. The monitor system 10 generally comprises a light source in the form of an UV-LED 20, a flow cell 30, an absorption light detector 40, a reference light detector 42, and a controller 50. The UV-LED 20 may essentially be any type of UV-LED capable of emitting light in the desired UV spectra. In the disclosed embodiment, a band pass interference filter 22 is provided between the UV-LED 20 and an entrance window 36 in the flow cell 30. The band pass filter 22 is an optical fil...

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Abstract

Absorption monitor system comprising a light source and a light detector arranged so as to define an absorption detection light path there between, and a controller arranged to control the operation of the light source, wherein the light source comprises a Light Emitting Diode capable of emitting light in the UV range (UV-LED) and wherein the absorption monitor system does not comprise a reference light-detector and the controller is arranged to compensate for fluctuations in light output intensity from the UV-LED.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a filing under 35 U.S.C. 371 of international application number PCT / EP2014 / 069865, filed Sep. 18, 2014, which claims priority to Indian application number 2812 / DEL / 2013, filed Sep. 24, 2013, the entire disclosures of each of which are hereby incorporated by reference.FIELD OF THE INVENTION[0002]The present disclosure relates to an optical absorption monitor system and in particular to a flow cell absorption monitor system.BACKGROUND[0003]Many substances absorb ultra violet or visible light due to their chemical composition. The absorption of light by substances has been used as the basis for detecting the presence of, and for measuring the concentration of, such substances for many years. The concentration of the substance can be determined by use of the Beer Lambert Law:A=Ebc where A is absorbance,E is the molar absorbtivity with units of L mol-1 cm-1,b is the path length of the sample defined in cm; andc is the conc...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G01N21/00G01N21/05G01N21/33G01N21/27
CPCG01N21/33G01N21/05G01N21/274G01N2201/0624G01N2201/062
Inventor BHARGAV, ANOOPSRINIVASAN, JEGANATHAN
Owner CYTIVA SWEDEN AB
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